Year	% (modeled ILO estimate)
1991	39.051
1992	39.581
1993	39.355
1994	38.273
1995	39.024
1996	35.822
1997	35.408
1998	33.977
1999	30.151
2000	29.038
2001	27.975
2002	27.249
2003	27.167
2004	27.448
2005	27.739
2006	28.539
2007	29.12
2008	30.153
2009	28.171
2010	30.536
2011	31.7
2012	31.111
2013	30.458
2014	30.095
2015	30.227
2016	29.194
2017	28.35
2018	27.602
2019	25.49
2020	20.104
2021	21.339
2022	24.248
2023	23.452